Powering a GPU with a dell power brick. DIY ePSU!

So as fans of Tech City and Bryan always scavenging and salvaging what he can, I had an idea on how to power a graphics card in a computer that has a power supply that is either not big enough, not easy to change, or otherwise proprietary power supply that limits GPU choice down to something that only runs off the PCI-E power. Why have a 1050 when you can have a 1070? Enter...the Dell DA-2 Power brick. Looking at eGPU solutions i noticed people use this to power a GPU externally. My idea was to further adapt it to power a GPU on the inside of a computer, with a power brick that could be outside the computer (or inside, if there was room).